The FUD part is telling your dissatisfied users that a product of your own will be coming, and that to swap suppliers will cost them the churn fee, uselessly.
Of course every supplier wants buyers to stay faithful and captive; some suppliers just get products out fast, others attempt to string along their users by FUD.
In anything related to semiconductors, component prices fall by 40% per year or so; so it is very useful to set a competitive pricepoint early by a preannouncement (when prices are high) and deliver later (when costs are low). This is also responsible for a lot of computer preannouncements.
I don't know whether Canon are playing FUD as part of a premeditated strategy; my feeling is that they wanted to hang on to their obsolescing IC fabs for too long, and also segment the market between video and stills, and it's costing them, so now they are resorting to FUD as an act of despair.
Edmund